Device for Reducing Noise, Muzzle Flash and Recoil of a Firearm

ABSTRACT

Module-based device for a firearm for sound direction and recoil dampening, which device is arranged for detachable fastening to a barrel of the firearm, which device includes at least one sound directing and recoil dampening module formed by a fastening device for fastening the module-based device to the barrel of the firearm and provided with means for directing/leading sound forward and away from a shooter and bystanders, and reduction for recoil and muzzle flash. The sound directing and recoil dampening module is further adapted for arrangement of at least one sound dampening module.

BACKGROUND

The disclosure is related to a module-based device for firearm, such as a rifle or handgun. More particularly, the disclosure is related to a module-based device for detachable mounting to a firearm barrel or fastening element(s) arranged to the firearm barrel, which includes a least one sound directing and recoil dampening module.

The disclosure is also related to a module-based device which in a simple manner can be added at least one sound dampening module which in a simple manner can be adapted individual needs and therethrough provide a complete device for sound direction, recoil dampening and sound dampening.

Noise from firearms is a problem at several levels; for the shooter himself, and for other people (hunting mates, team mates, other competitors, and people living close to firing ranges).

There is little doubt that undamped noise is a potential threat to the hearing of a shooter and bystanders, and in best case is an irritation moment for nearby buildings.

In line with development of buildings extending out from the cities and closing in on existing firing ranges, noise from these could result in conflicts between residents and shooters. EU has indicated that within a few years restrictions will come for both this kind and other forms of noise, as noise is generally an increasing problem in both larger cities and other places. It is proposed that no activities (from e.g. industry, traffic, etc.) can exceed 135 dB.

Firearms are notoriously noisy in use, which in combination with radical changes in knowledge level and attitudes to this with protection of the hearing of shooters, hunters and military personnel, have resulted in a severe increase for and the use of silencers on firearms, especially in the last decade.

Silencers have several advantages; they reduce of course noise which the shooter and bystanders are exposed to; they reduce to varying extent the recoil of the firearm they are arranged on—especially shoulder weapons—and they will often, to some extent, improve the precision of the firearm, as the affection on the barrel in the firing moment becomes uniform, and the vibrations as well. Silencers also reduce, albeit to varying degrees, muzzle flash as the firearm is fired. This does not have large signification for civil users, but can be of vital significance for military personnel.

Silencers in the form of sound directors/devices directing the sound forward will also simplify the reduction of noise from e.g. a fire range, by that the most of the sound will move in a specific direction, and thus simplify physical, sound damping installations as noise embankment, fences, etc.

Sound dampening devices will further be exposed to high loads at firing which mainly is caused by high temperature and pressure of exhaust gasses. Sound dampening devices of prior art is thus manufactured from special materials and materials having relatively high weight. In addition they are often oversized as extra safety for the sound dampening device to withstand the loads they are exposed to. In addition, prior art sound dampening devices often include specially shaped elements for delaying and diverting the exhaust gases.

Further, sound dampening device of prior art are adapted for mounting in the extension of the barrel. This is something which will make the firearm substantially longer, which makes it less maneuverable (in woods, scrub and over ling for the hunter, and in addition indoor for the military operator). The firearm balance will also be affected negatively, as the firearm will be more nose-heavy, and that it will affect the hit point of the firearm compared to when the silencer is not mounted.

Known sound dampening device are usually of a tube-shaped construction and where one use different principles for reducing sound and/or recoil, which among others, references are made to U.S. Pat. No. 5,029,512, U.S. Pat. No. 4,907,488, GB 191024766 and N0335475.

From U.S. Pat. No. 8,939,057 it is known different embodiments for a dynamic suppression mechanism for a firearm.

U.S. Pat. No. 1,111,202 describes a sound dampening device for firearm which in principle is an inner silencer unit including baffles moving forth and back in a tube being fixed in front of the barrel of the firearm.

From U.S. Pat. No. 1,525,846 it is known a silencer for a firearm including a cylindrical housing wherein spring-loaded cylindrical core with holes is arranged.

WO 2014041383 describes a solution where one or more spring-loaded chambers move axially in the firing moment.

There also exist several similar solutions.

The known sound dampening devices have as common feature that they are adapted the actual caliber, and are thus useless for larger calibers than the one the silencer is constructed for, and must be considered less effective for calibers smaller than the one the silencer is constructed for. Known sound dampening devices are vulnerable for so-called mirage, i.e. that heat waves/flicker is created above the device as the temperature in and at the surface is rising.

Especially at use of optical aiming means this is negative, as the aim/aim picture is distorted. Known sound dampening devices further have limited lifetime. The properties of these devices are weakened by the use, and oxidation in the devices (caused by exhaust gases formed at firing) change and erode the surfaces for delaying and diverting the exhaust gases. Most of the existing devices have a practical lifetime of 500-2000 rounds, dependent of the maintenance.

Further, the known sound dampening devices are exclusively adapted for mounting in the extension of the barrel, and hold high weight and size, something which will affect both balance and manageability.

Further, the known sound dampening devices have considerable weaknesses as regards directing the sound forward and away from the shooter.

Another considerable disadvantage with the known sound dampening devices are that they, as mentioned, are adapted to one type of caliber, which will say that they neither can be changed in an simple manner nor be adapted to individual needs.

It is accordingly a need for providing a module-based device for firearm which in a simple manner can be adapted to individual needs by the use of modules with different properties as regards sound direction, recoil dampening and sound dampening.

It is further a need for providing a module-based device for firearm which has compact size and low weight.

It is further a need for providing a module-based device for firearm which does not substantially increase the length of the firearm after mounting.

It is further a need for a module-based device for firearm which to the least possible extent affects the balance of the firearm.

It is further a need for providing a module-based device for firearm which is not burdened with mirage problems, and has longer lifetime than the prior known sound dampening devices.

It is also a need for providing a module-based device where separate parts can be exchanged in a simple manner.

It is also a need for providing a module-based device for firearm which directs the sound away from the shooter and possible hunting or team mates.

SUMMARY

The disclosure provides a module-based device for firearm which partly or entirely solves the above-mentioned problems of prior art.

The disclosure further provides a module-based device for a firearm which is arranged for directing the sound away from the shooter and possible hunting and team mates.

The disclosure further provides a module-based device which in addition to providing sound direction also provides recoil dampening.

The disclosure further provides a module-based device for a firearm which has a compact construction and low weight.

The disclosure further provides a module-based device for a firearm, which in addition to sound direction and recoil dampening in a simple manner can be arranged for sound dampening.

The disclosure further provides a module-based device for a firearm which does not result in substantially increased length of the firearm after mounting.

The disclosure further provides a module-based device which affects the balance of the firearm as little as possible.

The disclosure further provides a module-based device for a firearm which in addition to the above-mentioned is arranged for improvement of precision of the firearm. Additionally, the disclosure provides a module-based device for firearm which in addition to the above-mentioned is arranged for improving the manageability of the firearm.

The disclosure further provides a module-based device for a firearm which does not affect the hit point for the firearm, so that the firearm exhibits the same hit point with and without the module-based device.

The disclosure further provides a module-based device for a firearm which can be used with a wide specter of the most common available calibers.

The disclosure further provides a module-based device for firearm which by means of modules can be adapted to individual needs.

Further features will appear at consideration of the following description, claims and the attached drawings.

A module-based device for firearm according to the disclosure is formed by at least one module-based sound directing and recoil dampening module (MSD M).

The module-based device can further be adapted with at least one module-based sound dampening module (MSM), arranged for fastening to the MSDRM.

The modules can further separately be formed by several modules, where all modules are arranged for simple mounting to each other for therethrough to adapt or change the properties of the module-based device.

The MSDRM forms the base component in the module-based device and is adapted for mounting to barrel of the firearm, directly or via a fastening device, and further form a fastening point for MSMs. The MSD M is further provided with means for directing/leading sound forward and away from the shooter and bystanders, and to a large extent reduce muzzle flash and reduce recoil (sharp backward movement of the firearm at firing).

The MSDRM further includes a sleeve or tube which limits the MSDRM in circumferential direction or it can be arranged to a MSM, which surrounds the MSDRM and provides an inner volume in front of and/or behind the MSDRM for use for directing sound and/or damping recoil.

The MSM can be adapted to the desires of the user based on if it is sound or recoil or both which is to be dampened/reduced.

The MSDRM preferably exhibits in this connection an outer circumference which is larger than outer circumference of the barrel for providing a volume available for powder gases after firing which can be used to direct gas away or which can be used by a MSM for sound dampening and/or recoil dampening. According to the disclosure this available volume can be used fixed or by that it changes by that the MSM is adapted for this.

In other words the MSDRM(s) is an inner unit in the module-based device while the MSM(s) form an outer unit in the module-based device.

Accordingly, the user can himself adapt the dampening degree (sound and/or recoil) to its use by adding modules changing the volume of the MSM and/or properties.

In one embodiment the module-based device includes a MSDRM (inner module) and a MSM (outer module), where the MSM is arranged movable in relation to the MSDRM. The MSDRM is formed by a mainly cylindrical fastening device arranged for detachable fastening directly or via an attachment device to the barrel of the firearm, where the fastening device has an extension extending forward and backward from the barrel muzzle, seen in the longitudinal direction of the barrel, and where the inner diameter of the fastening device is adapted the outer diameter of the barrel.

The MSDRM further includes a valve device, arranged in the extension of the firearm barrel, which is arranged to close on basis of gas pressure after the projectile has passed, and opens after the gas pressure has dropped and thus brakes and divert the beam of powder gases “chasing” the projectile out of the muzzle, and preventing these from affecting projectiles with especially high velocity. It is a known problem with projectiles leaving the muzzle with high velocity that one get precision problems due to the powder gases affect the projectile immediately after it has excited the barrel. The MSDRM according to the disclosure will accordingly scatter the most of these powder gases immediately before the bullet excites, and one thus maintains the precision.

In a further embodiment the MSDRM includes a gas distributor, e.g. in the form of a valve or channels, surrounding the above mentioned valve and which exhibits an outer diameter which is larger than the outer diameter of the barrel. The gas distributor further has an extension extending from in front of the barrel muzzle and some backwards on the barrel. The MSDRM is accordingly arranged to distribute gas from the firing into a MSM or out of the module-based device, which will be further described below.

The MSM is in its most plain form is formed by an outer mainly cylindrical sleeve or tube exhibiting an inner diameter which is adapted to the outer diameter of the MSDRM/gas distributor and has an extension in the longitudinal direction being longer than the MSDRM, is attached to this and surrounds this.

In a further embodiment, where the MSM is arranged movable in relation to the MSDRM, the MSM is formed by an inner and outer mainly cylinder-shaped sleeve or tube, which has an extension in longitudinal direction which is longer than the MSDRM.

In both these cases, i.e. where the MSM is movably arranged in relation to the MSDRM, the gas distributor forms a contact/sliding surface for the MSM, i.e. the inner sleeve or tube for the first mentioned alternative, and forms a barrier between front part of the module-based device and rear part of the module-based device and therethrough form a front and rear chamber in the module-based device.

In the alternative with an inner and outer tube can both these be moved together or that only one of these moves, while the other stands still.

The outer mainly cylindrical sleeve or tube of the MSM can be provided with a detachable lid exhibiting a centrally through hole for passing of a projectile. At the other end, the outer mainly cylindrical sleeve or tube is provided with a detachable lid exhibiting a centrally through hole adapted to the total diameter of the barrel and the mainly cylinder-shaped fastening device of the MSDRM.

The module-based device in this embodiment further includes a spring device arranged in the movable MSM for returning the MSM to initial position, which will be further described below. In an embodiment the MSM can be arranged to the MSDRM such that the sound dampening module can be movable in longitudinal direction in relation to the MSDRM and the barrel, and after arrangement of the MSM to the MSDRM the module-based device exhibits a front chamber in the movable MSM, in front of the gas distributor, and a rear chamber in the movable MSM, behind the gas distributor, seen in relation to the longitudinal direction of the barrel. In other words, the gas distributor forms a barrier in the module-based device between the front and rear chamber in the MSM.

In other words the module-based device for firearm according to the disclosed embodiments exhibits an inner volume which can change properties by that the movable MSM is arranged for movement in longitudinal direction of the firearm barrel, and therethrough capable of changing the volume in the front and rear chamber.

A diffusor and/or valve device, possibly together with gas distributor, can further be used for balancing the pressure distribution between the front and rear chamber.

In an alternative embodiment the MSD M can mainly function fastening point for a stationary MSM, where the mainly cylindrical sleeve or tube of the MSM is fixed to the outer diameter of the MSDRM, and its content (valve devices, possibly walls, discs or baffles), are fixed to the same fastening device as the interior components of the MSDRM, more exactly on two or more bolts, extending forward in longitudinal direction from the MSDRM, and which are parallel with the barrel of the firearm.

Accordingly, the module-based device will, when it is arranged to a firearm, have its mainly extension backwards along the barrel, i.e. from the barrel muzzle, seen in longitudinal direction of the barrel. In other words, the total length of the firearm with the module-based device mounted, will only be increased with a few centimeter.

The balance point for the module-based device will further be arranged behind the barrel muzzle itself, something which results in that the balance of the firearm does not change negatively.

In comparison with prior art one can imagine that the total length with the module-based device will increase the total length with 3-9 cm and have a total weight of approximately 100 to 200 grams, while conventional silencers will increase the total length of the firearm with 15-35 cm and often have a weight of 350 to 750 grams, depending on model and caliber, in addition to that the silencer balance point then will lie in the extension of the barrel.

For further effective reduction of the recoil movement of the firearm, the module-based device can include a recoil compensator device, arranged in front part of the MSM, i.e. in the front chamber, which recoil compensator device is arranged for reducing and scattering the recoil movement. The recoil compensator device can be stationary arranged in the front chamber or movably arranged in the front chamber of the MSM.

The MSM can further include a front chamber divided in several chambers, something which also will result in reduction of recoil movement as described above.

The MSM can further be formed by several sub-modules so that one by arranging sub-modules in longitudinal direction pf the MSM can form several chambers in connection with the front chamber and in this way change the properties of the MSM and accordingly the module-based device.

According to an alternative embodiment of the MSDRM for the module-based device it includes one or more valve devices (in opposition to a stationary valve device with diffusive effect, where the gas from firing of the firearm is pressed outwards, perpendicular to the path of the projectile through the device) which entirely or partly close for the gas beam following the projectile on its way out of the barrel and through the MSD M, for further reduction of recoil and muzzle flash, at the same time as noise mostly is directed forward.

According to a further alternative of the MSM for the module-based device the sound dampening module includes one or more valve devices (in opposition to a stationary valve device with diffusing effect where gas from firing of the firearm is pressed outwards, perpendicular to the path of the projectile through the device), arranged after one another in the longitudinal direction where gas from the firing of the projectile is stopped and encaged, as consequence of gas pressure acting on the valve device(s), which close immediately after the projectile has passed the valve device(s).

Each valve device can form sub-modules for the MSM or MSDRM, such that one in a simple manner can change the properties of the MSM or MSDRM, and accordingly the module-based device by adding sub-modules in longitudinal direction of the MSM or MSDRM.

With the latter embodiments is achieved that gas/pressure is denied a way out of the module-based device, and in practice becomes standing still, therethrough removing the source of the shot bang from the firearm, as the gas breaching the sound barrier and expanding out of the module-based device creates the shoot bang.

The module-based device will, according to the above described embodiments function in the following manner:

1. When a projectile from a fired round passes the valve device in the MSDRM the powder gases will close the valve device, and be diffused away from the MSDRM center and directed forward and out in a direction away from the shooter. The powder gases will be directed by the gas distributor of the MSDRM. The valve device opens automatically when the pressure has dropped sufficiently.

2. When a projectile from a fired round passes the diffusor in the module-based device power gases can be diffused and directed into the rear chamber in the module-based device by the gas distributor.

The module-based device according to the above described embodiments will further function in the following manner:

1. When a projectile passes the MSDRM (ref. point 1 above) the powder gases closes the valve device, and is distributed to the MSM, where they in turn can be directed through one or more valves/baffles/discs/walls, before they excite out of the device. All valves are reset to initial position when the pressure has dropped sufficiently.

2. When the projectile has passed the MSDRM (ref. point 2 above) the gas distributor balances the pressure distribution in the rear and front chamber by that the gas distributor closes for gas in the rear chamber such that gas flows into the front chamber via the barrel and the gas distributor. This results in that it is built up a gas pressure in the front chamber which results in that the movable MSM is pushed forward and increases available volume in the front chamber. By that the movable MSM is pushed forward this results in that the available volume in the rear chamber is reduced, and the gas in the rear chamber is compressed and brakes the forward motion of the movable MSM, i.e. that gas pressure in the rear chamber ensures a gradually braking if the movable MSM forward motion by that it is formed a gas padding in the rear chamber. The forward motion of the movable MSM at the same time results in that the spring device is compressed and after the gas pressure in the front chamber drops, the stored force will move the movable MSM back to initial position again.

In other words, the disclosed embodiments provide a module-based device for a firearm where one first directs/leads the sound in the firing moment forward and away from the shooter and reducing recoil and muzzle flash by the properties of the MSD M.

Next, if the module-based device includes a MSM further increased is dampening of sound and reduction of recoil by the properties of the MSM. This can be tailored by that one uses modules with different properties, as described above. In other words, module-based device, one can adapt the module-based device after desires of the shooter, dependent of use. The module-based device will further at mounting to the firearm to a far extent affect the balance point of the firearm, compared to prior art, and that it is provided a compact and light solution (low weight) which does not substantially increase the total length of the firearm.

With the module-based device one can reduce sound to more living levels, and directing this sound, such that noise from a firing range/firing plant mainly goes in one certain direction, and that the existing noise more easily can be dampened (through noise embankment/fences, etc.).

A preferable material to manufacture the module-based device will be titanium, a material which does not conduct heat to the same extent as light metal and steel. The module-based device or components thereof can further also be made in a synthetic material, such as carbon, Inconel or similar, especially for small calibers. The module-based device has the advantage over prior art the it ventilates heat out of the construction in an improved way in relation to prior art, as the module-based device changes properties and/or available volume for powder gases for each round.

A further advantage over known devices is that the surface of the module-based device is far shorter than traditional sound dampening devices, and thus creates less mirage.

The module-based device is further manufactured of a material, which as mentioned above, is far more resistant than traditional sound dampening devices against oxidation in the module-based device (caused by exhaust gases formed at firing), and that the components are easily exchangeable to a low cost. This results in a cost effective module-based device with lower cost per round and longer lifetime than traditional devices.

In addition to these advantages one further have the fact that it is module-based, something which results in that one can change its properties and adapt it to individual needs.

Further preferable features and advantageous details of the disclosed embodiments will appear from the following example description with references to the drawings, and claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosed embodiments will below be described in further detail with references to the attached drawings, where:

FIG. 1 shows a perspective view of a module-based device mounted to a barrel for a firearm,

FIG. 2 shows a cross-sectional view of a first embodiment of a module-based device,

FIG. 3 shows a cross-sectional view of a second embodiment of a module-based device,

FIG. 4a-c show different cross-sectional views showing details of the module-based device,

FIG. 5a-c show numerous cross-sectional views of the module-based device arranged to a barrel of a firearm, which shows a time lapse at firing of a projectile,

FIG. 6 show a cross-sectional view of a further embodiment of a module-based device, where the sound dampening device is provided with a recoil compensator device in front chamber, and

FIG. 7a-d show perspective views and cross-sectional views of a further embodiment of a module-based device.

DETAILED DESCRIPTION

Reference is now made to FIG. 1 showing a perspective view of a module-based device 10 mounted to a barrel 100 for a firearm and to FIG. 2 showing a cross-sectional view of the module-based device 10 according to a first embodiment, and FIG. 3 showing a module-based device 10 according to a second embodiment, and FIGS. 4a-c showing details of components of the module-based device 10.

The module-based device 10 is based on a module-based sound directing and recoil dampening module (MSDRM) 20, as shown in detail in FIG. 4a , and a module-based sound dampening module (MSM) 30, as shown in FIGS. 4b and 4c , respectively, where the MSM 30 in mentioned embodiments is arranged movable in longitudinal direction of the module-based device 10 and in relation to the MSDRM 20.

The MSDRM 20 is formed by a mainly cylinder-shaped fastening device 21, the inner diameter thereof is adapted to outer diameter of a barrel 100 of a firearm the module-based device 10 is to be arranged to, and surrounds the barrel 10 without slack, see FIGS. 2 and 3, i.e. forming a contact surface against the outer diameter of the barrel 100. At the other end of the mainly cylinder-shaped fastening device 21 it exhibits an inner section 22 having a smaller inner diameter than the part of the fastening device 21 surrounding the barrel 100, where it is arranged an area with threads 23 adapted to co-operate with a corresponding outer threaded section 101 on the barrel 100, see FIGS. 2, 3 and 5 a-b. In this way the module-based device 10 is detachably attached to the barrel 100 of the firearm in a secure manner. Other alternative fastening ways will be within the knowledge of the skilled person.

At the end of the threaded area the MSDRM 20 includes a mainly cylinder-shaped diffusor 24 which exhibits a number of gas nozzles 25 in circumferential direction thereof. The diffusor 24 exhibits an inner diameter being at least as large as the inner diameter of the barrel 100 to allow a projectile 110 to pass.

The MSDRM 20 further includes a mainly cylinder-shaped gas distributor 26, where mentioned gas distributor 26 exhibits an inner diameter adapted the outer diameter of the diffusor 24 and an outer diameter being larger than the outer diameter of the barrel, and is adapted the inner diameter of the MSM 30, further described below. The gas distributor 26 further has an extension in longitudinal direction of the barrel where it extends from in front of the barrel muzzle and at least in on the barrel, seen in longitudinal direction of the barrel. The gas distributor 26 further includes gas channels 27 a extending in the vertical plane from the diffusor 24 and to gas channels 27 b extending in the horizontal plane close to the outer circumference of the gas distributor 26, i.e. the part of the gas distributor 26 being outside the outer circumference of the barrel 100. The gas channels 27 a-b are thus arranged to direct gas away from the diffusor 24 and further out in front of and behind the gas distributor 26, which will be further described below.

The gas distributor 26 can be one of several designs, which either diffuses gas from the firing perpendicularly on the projectile path, or which entirely or partly closes for the movement of gas forwards in the device immediately after the projectile has passed. This can be performed in such a way that the gas pressure forces one or more valve parts towards center of the projectile path.

A MSM 30 for the module-based device 10 according to a first embodiment, as shown in FIGS. 2 and 4 b, is formed by an outer mainly cylinder-shaped sleeve or tube 31 which has an extension in longitudinal direction being longer than the MSD M 20 and exhibits an inner diameter adapted the outer circumference of the mainly cylinder-shaped gas distributor 26, such that the gas distributor 26 forms a contact/sliding surface for the outer sleeve or tube 31. At the same time the gas distributor 26 forms a front chamber 50 in the outer sleeve or tube 31, in front of the gas distributor 26, and a rear chamber 51 between the MSDRM 20 and the outer sleeve or tube 31, behind the gas distributor 26.

In an alternative embodiment one can imagine a space between the gas distributor 26 outer diameter and the mainly cylinder-shaped tube 31 inner diameter, where gas is allowed to flow.

At front part of the mainly cylinder-shaped sleeve or tube 31 it is arranged a lid 32 with a centrally through hole 33 where a projectile 110 can pass.

At rear end of the outer sleeve or tube 31 it is arranged a lid 34 with a centrally through hole 35 with a diameter adapted to receive the mainly cylinder-shaped fastening device 21.

According to a second embodiment of the MSM 30 for the module-based device 10, as shown in FIGS. 3 and 4 c, the MSM 30 is formed by an outer 31 and inner 40 mainly cylinder-shaped sleeve or tube, which have extension in longitudinal direction being longer than the MSDRM 20, where the inner diameter of the inner sleeve or tube 40 is adapted the outer diameter of the mainly cylinder-shaped gas distributor 26, and where the outer diameter of the inner sleeve or tube 40 is adapted the inner diameter of the outer sleeve or tube 31. The gas distributor 26 here form a front chamber 50 in the inner sleeve or tube 40, in front of the gas distributor 26, and a rear chamber 51 between the MSDRM 20 and outer sleeve or tube 31, behind the gas distributor 26. As shown in FIG. 4c the inner sleeve or tube 40 is preferably provided with channels/slits 41 in longitudinal direction of the outer diameter of the inner sleeve or tube 40, through which gas can move between the two mentioned chambers 50, 51 in the MSM 30 of the module-based device 10. The inner sleeve or tube 40 is further perforated 42 in a pattern allowing gas to move in the channels/slits 41, between the inner 40 and outer 31 sleeve or tube. Further, the size and number of perforations 42 will be adapted desired functionality, caliber, etc. The inner 40 and outer 31 sleeve or tube can be arranged movably to each other as a unit, or that one of them are movable in relation to the other, typically the outer 31 sleeve or tube to provide increased volume at the firing moment, but one can also imagine embodiments where the inner sleeve or tube 40 moves.

The module-based device 10 further includes a spring device 60, such as a helical spring, arranged in the module-based device 10 for moving the MSM 30 back to initial position. This can be done in numerous ways, e.g. as shown in FIG. 2, by using an annular spring stopper 27 arranged to the fastening device 21, use the gas distributor 26 as spring stopper, use an assembly/cassette of springs, arrange the spring function in a separate chamber at the back of the device 10, such that it is not affected by the extremely hostile environment (for spring steel) as the inside of a module-based device 10 constitutes. Other alternatives can be to arrange the spring device 60 in front of the module-based device 10, a solution which can be used when the outer sleeve or tube 31 stands still and the inner sleeve or tube 40 moves. As one can see there will be many possibilities for arrangement of a spring device 60 in the module-based device 10, which will be within the knowledge and way of thinking for a skilled person.

AS mentioned above it is formed a front 50 and rear 51 chamber in the module-based device 10, and where the function of the diffusor nozzles 25 is to diffuse (powder) gases in connection with a passing projectile 110, while the function of the gas distributor 26 is to balance the pressure distribution in the front 50 and rear 51 chamber of the module-based device 10, which will be further described below.

Reference is now made to FIGS. 5a-c showing principle drawings of the module-based device 10 according to the first embodiment, in a time lapse from a projectile 110 is fired and to it leaves the module-based device 10, for detailed explanation of how the module-based device 10 functions.

In FIG. 5a is shown a situation where the projectile 110 is fired and on way towards the barrel muzzle and on its way to leave the barrel 100 and enter the module-based device 10, which then is in initial position/normal position.

In FIG. 5b is shown a situation where the projectile 110 is on its way into the module-based device 10, where the diffusor 24 by means of the gas nozzles 25 directs (powder) gases into the rear chamber 51 via the gas distributor 26. I.e., when the projectile 110 has passed the gas nozzles 25 gas is flowing out through these and directed into the rear chamber 51 via the gas distributor 26 and its channels 27 a-b. In this state the MSM 30 of the module-based device 10 still is in initial position/normal position.

In FIG. 5c is shown a situation where the projectile 110 has passed the diffusor 24 (diffusor nozzles 25) and is on its way out of the module-based device 10. Gases flow then into the front chamber 50 via the barrel 100 and via the gas distributor 26, something which results in that gas push against the lid 32 in the outer sleeve or tube 31 as a consequence of the gas pressure in the front chamber 50, something which again results in that the outer sleeve or tube 31 is pulled forward due to the gas pressure and provides increased volume in the front chamber 50. In this way the gas distributor 26 balances the pressure distribution in the front 50 and rear 51 chamber of the module-based device 10 by that the gas distributor 26 closes for gas in the rear chamber 51, where the pressure is built up due to that the volume of the rear chamber 51 is reduced as a consequence of the outer sleeve or tube 31 is moving forward, seen in longitudinal direction of the barrel, something which results in that gas in the rear chamber 51 is compressed and brakes the forward motion of the outer sleeve or tube 31. In other words it is created a gas pressure (a “gas padding”) in the rear chamber 51 which gradually brakes the forward motion of the outer sleeve or tube 31. This forward motion of the outer sleeve or tube 31 will also result in that the spring device 60 arranged in connection with the outer sleeve or tube 31 is compressed and as the gas pressure in the front chamber 50 drops the stored force in the spring device 60 will result in that the outer sleeve or tube 31 is moved back to initial position again.

In the second embodiment where the MSM 30 also includes an inner sleeve or tube 40 which exhibits channels/slits 41 with perforations 42, gas will in addition flow between the chambers 50, 51 via the channels/slits 41.

Reference is now made to FIG. 6 showing an alternative embodiment of the module-based device 10, as described in FIG. 3, where it in the front chamber 50 is arranged a recoil compensator device 70, which task is to delay and divert gas and therethrough scatter and reduce recoil movement in the firearm. The recoil compensator device 70 can be formed in several ways. E.g. the recoil compensator device 70 can be formed by one or more vertical walls 71 (also known as baffles) which are arranged mainly perpendicular to the longitudinal direction of the module-based device 10 in the front chamber 50, which walls 71 exhibit a centrally through hole 72 where the projectile 110 can pass. In its plainest embodiment these walls 71 can be formed by discs. In an alternative embodiment these walls 71 can be designed to exhibit a funnel-shape (known as K-baffle), inverted funnel, etc. The funnel-shape is there to either scatter gas away from the center line (there the projectile moves), or to collect it. The walls 71 can further be arranged after one another, straight up and down, or they can be constructed in such a way that, they together with other walls form a chamber 50 a. The more chambers 50, 50 a, the more delay of the gas, and the more surfaces it must collide with on its way to equalization.

An alternative embodiment of the above mentioned walls 71 is that the recoil compensator device 70 is formed by a unit containing (one or more) valve devices 300 (see FIGS. 7c-d ), diffusor holes, walls 71, formations or a combination of two or more of these, which can delay and divert gas.

The recoil compensator device 70 can further be arranged stationary or movable in the front chamber 50, e.g. by means of two or more rods/bolts 73 extending in longitudinal direction of the module-based device 10, fixed to the fastening device 21 of the MSDRM 20 or the MSM 30.

The recoil compensator device 70 will accordingly contribute to that the MSM 30 more rapidly is forced forward by the pressure formed in the front chamber 50 by that the gases do not need to reach all the way to the lid 32 before the gas pressure pushes the MSM 30 forward.

As regards the movable alternative for the recoil compensator device 70, this can be achieved by that it e.g. is arranged spring devices (not shown) in front of and/or behind the longitudinal rods/bolts 73, which the recoil compensator 70 is fixed to, and/or spring devices in front of and behind the recoil compensator 70 itself. The recoil compensator device 70 can e.g. be connected with the spring device 60 of the MSM 30 via the mentioned rods/bolts 73, and therethrough use the same spring devices 60 for both parts. As the recoil compensator device 70 springs and moves forward before they return to initial position due to spring pressure, reducing and scattering the recoil movement considerably. Accordingly, the recoil compensator device 70 will move with the M LM 30 when this is moved in relation to the MSDRM 20/barrel 100.

It should also be mentioned that the recoil compensator device 70/rods/bolts 73 will have the function that they form a contact/sliding surface which the MSM 30 rests on in the front chamber 50.

Reference is now made to FIGS. 7a-d showing a further embodiment of a module-based device 10, where both the MSDRM 20 and MSM 30 stands still, i.e. is fixed arranged to each other and the barrel 100.

In the embodiment shown in FIGS. 7a-b the MSDRM 20 includes a valve device 300 and a gas distributor 26 and includes an outer sleeve or tube 301. The valve device 300 is fixed to the fastening device 21 by means of rods or bolts 73, and the valve device 300 exhibits a circumference being smaller than the inner diameter of the sleeve or tube 301 so that it is formed a passage therebetween where gas can flow. In this embodiment, when a projectile is passing the MSDRM 20, the valve device 300 will be close by powder gases following a projectile, which by means of the valve device 300 are diffused away from the MSDRM 20 center and directed away by means of the gas distributor 26 to a chamber 51 behind the MSDRM 20 inside the outer sleeve or tube 301 and further directed forward and out of the outer sleeve or tube 301 and out of the module-based device 10, away from the shooter. The valve device 300 is arranged for opening again automatically when the pressure has dropped sufficiently.

In the embodiment in FIGS. 7c-d the module-based device 10 in addition includes a MSM 30 formed by a cylinder-shaped sleeve or tube 31, where it in the front chamber 50 is arranged at least one valve device 300, in the example it is shown three valve devices 300, arranged after one another with a distance therebetween, where the valve devices 300 exhibit a circumference which is smaller than the inner diameter of the outer sleeve or tube 31, which valve devices 300 are fixed to the fastening device 21 of the MSD M 20 with rods or bolts 73 protruding in longitudinal direction out from the fastening device 21.

The valve devices 300 function in the same manner as described above such that they are closed as a consequence of gas pressure as the projectile passes the valve devices 300 on its way through the module-based device 10. As the valve devices 300 close, the powder gases will be directed away from center of the module-based device 10 and to the passages between the valve devices 300 and the outer sleeve or tube 31 and thus be delayed, diverted and distributed in the MSM 30, before they excite out of the module-based device 10. In other words it is formed a series of chambers 50 a in the MSM 30. All the valve devices 300 are reset to initial position when the pressure has dropped sufficiently.

With this is achieved that gas/pressure is denied a direct way out of the module-based device 10, and in practice become standing still in chamber/chambers 50 a, therethrough removing the source of the shoot bang from the firearm. The different embodiments described above can be modified and combined to form new embodiments which are within the scope of the attached claims.

The different components of the module-based device can be manufactured of different materials. It is e.g. possible to imagine that the diffusor part in one material, and the remaining parts of the device in another material, to achieve optimal weight reduction for the actual version, and with sufficient, but not unnecessary much, heat resistance. In a device intended for smaller pressure strong calibers one can imagine a main tube in synthetic material. 

1-15. (canceled)
 16. A module-based device (10) for a firearm for sound direction and recoil dampening, which device (10) is arranged for detachable fastening to a barrel (100) of the firearm and includes at least one sound directing and recoil dampening module (20) formed by a fastening device (21) for fastening of the module-based device (20) to the barrel (100) of the firearm, the sound directing and recoil dampening module (20) being provided with a gas distributor (26) surrounding: a diffusor (24) arranged in an extension of the barrel (100), the diffusor (24) being arranged for diffusing gas via gas nozzles (25) in circumferential direction thereof after a projectile (110) has passed, or a valve device (300) arranged in an extension of the barrel (100), wherein the gas distributor (26) further comprises gas channels (27 a) extending in vertical plane of the diffusor (24) or valve device (300) for diverting powder gases following a projectile (110) in a perpendicular direction of projectile path immediately as the projectile (110) leaves the barrel (100) and into a chamber (51) formed between the fastening device (21) and an outer sleeve or tube (31, 301), wherein the chamber (51) has an extension from the gas distributor (26) and backwards on the barrel (100), wherein the gas distributor (26) further comprises gas channels (27 b) extending in horizontal plane allowing powder gases diverted to the chamber (51) to flow forward, seen in a longitudinal direction of the module-based device (10), into a chamber (50, 50 a) of a sound dampening module (30) arranged to the sound directing and recoil dampening module (20) or out of the module-based device (10), for directing/leading sound forward and away from a shooter and bystanders, and reduction for recoil and muzzle flash.
 17. The module-based device (10) of claim 16, wherein the sound directing and recoil dampening module (20) has an outer circumference and the barrel has a circumference, and the outer circumference of the recoil dampening module (20) is larger than circumference of the barrel (100).
 18. The module-based device (10) of claim 16, wherein the sound directing and recoil dampening module (20) includes at least one valve device (300) arranged in extension of the barrel (100), which at least one valve device (300) is arranged at least partly closing for a gas beam following a projectile (110) on its way out of the barrel (100) and through the sound directing and recoil dampening module (20).
 19. The module-based device (10) of claim 16, wherein the gas distributor (26) has an extension in the longitudinal direction which extends from in front of the barrel (100) muzzle and at least in on the barrel (100), seen in the longitudinal direction of the barrel (100).
 20. The module-based device (10) of claim 16, wherein the sound directing and recoil dampening module (20) includes a sleeve or tube (31, 301) that limits the sound directing and recoil dampening module (20) in a circumferential direction.
 21. The module-based device (10) of claim 16, characterized in that it further includes at least one sound dampening module (30) attached to the sound directing and recoil dampening module (20) for sound dampening.
 22. The module-based device (10) of claim 21, wherein the sound dampening module (30) surrounds the sound directing and recoil dampening module (20) and provides an inner volume in the device (10) for use for dampening of sound, recoil, or both.
 23. The module-based device (10) of claim 21, wherein the sound dampening module (30) is formed by a substantially cylindrical-shaped sleeve or tube (31, 301) having an inner diameter which is adapted to the outer circumference of the sound directing and recoil dampening module (20), or is adapted for a passage therebetween.
 24. The module-based device (10) of claim 21, wherein the sound dampening module (30) is formed by a substantially cylindrical-shaped outer (31) and inner (40) sleeve or tube, the inner sleeve or tube (40) having an inner diameter that is adapted to an outer circumference of the sound directing and recoil dampening module (20), the inner sleeve or tube (40) having an outer diameter that is adapted to an inner diameter of the outer sleeve or tube (31), or the inner sleeve or tube (40) is adapted for a passage therebetween.
 25. A module-based device (10) of claim 22, wherein the inner volume is divided in a front chamber (50) and a rear chamber (51) in the outer sleeve or tube (31), limited by the sound directing and recoil dampening module (20).
 26. The module-based device (10) of claim 16, wherein the sound dampening module (30) is movable in the longitudinal direction of the device (10) and relative to the sound directing and recoil dampening module (20).
 27. The module-based device (10) of claim 26, comprising a spring device (60) arranged in the sound dampening module (30).
 28. The module-based device (10) according to claim 25, comprising a recoil compensator device (70) arranged in the front chamber (50), the recoil compensator device (70) being stationary or movable in relation to the sound dampening module (30).
 29. The module-based device (10) of claim 28, wherein the recoil compensator device (70) divides the front chamber (50) into numerous chambers (50 a).
 30. The module-based device (10) of claim 28, wherein the recoil compensator device (70) is formed by a unit which includes at least one from the group consisting of valve devices (300), diffusor holes, walls (71), formations, or a combination thereof for delaying and diverting gas.
 31. The module-based device (10) of claim 17, wherein the sound directing and recoil dampening module (20) includes a sleeve or tube (31, 301) that limits the sound directing and recoil dampening module (20) in a circumferential direction.
 32. The module-based device (10) of claim 17, wherein the sound dampening module (30) is movable in the longitudinal direction of the device (10) and relative to the sound directing and recoil dampening module (20).
 33. The module-based device (10) of claim 19, wherein the sound dampening module (30) is movable in the longitudinal direction of the device (10) and relative to the sound directing and recoil dampening module (20).
 34. The module-based device (10) of claim 18, wherein the sound directing and recoil dampening module (20) includes a sleeve or tube (31, 301) that limits the sound directing and recoil dampening module (20) in a circumferential direction.
 35. The module-based device (10) of claim 17, characterized in that it further includes at least one sound dampening module (30) attached to the sound directing and recoil dampening module (20) for sound dampening. 